/*
 * (C) Copyright 2000-2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <aheppel@sysgo.de>

 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <asm/io.h>

DECLARE_GLOBAL_DATA_PTR;

#ifdef CONFIG_HI3536_A7
extern env_t *env_ptr;
#else
env_t *env_ptr = NULL;
#endif

extern uchar default_environment[];

#ifdef CONFIG_HI3536_A7
int nw_saveenv(void)
{
	return 0;
}
#endif

#ifdef CONFIG_HI3536_A7
void nw_env_relocate_spec(void)
#else
void env_relocate_spec (void)
#endif
{
#ifdef CONFIG_HI3536_A7
	unsigned int slave_env;

	slave_env = readl(SYS_CTRL_REG_BASE + REG_SC_GEN2);

	memcpy((void *)env_ptr, (void *)slave_env, sizeof(env_t));

	if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
		goto err_crc;

	gd->env_valid = 1;

	return;

err_crc:
	puts("*** Warning - bad CRC, using default environment\n\n");

	set_default_env();
#endif
}

#ifdef CONFIG_HI3536_A7
uchar nw_env_get_char_spec(int index)
#else
uchar env_get_char_spec (int index)
#endif
{
	return ( *((uchar *)(gd->env_addr + index)) );
}

/************************************************************************
 * Initialize Environment use
 *
 * We are still running from ROM, so data use is limited
 */
#ifdef CONFIG_HI3536_A7
int nw_env_init(void)
#else
int env_init(void)
#endif
{
#ifdef CONFIG_HI3536_A7
	gd->env_valid = 1;
#else
	gd->env_addr  = (ulong)&default_environment[0];
	gd->env_valid = 0;
#endif
	return (0);
}
